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Finding the Fourth Proportional to 221,262.40, 331,490.40 and 127,489.60

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Solution

The fourth proportional to 221,262.40, 331,490.40 and 127,489.60 is: 191,002.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,262.40 : 331,490.40 = 127,489.60 : x
  2. Step 2: Convert to fraction form
    221,262.40/331,490.40 = 127,489.60/x
  3. Step 3: Cross multiply
    221,262.40x = 331,490.40 × 127,489.60
  4. Step 4: Simplify right side
    221,262.40x = 42,261,578,499.84
  5. Step 5: Solve for x
    x = 42,261,578,499.84/221,262.40
  6. Step 6: Final answer
    x = 191,002.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.